Magnetic force on a conductor – Rankers Physics

Force Acting on Moving Charges: Practice Problem & Solution

Statement-1: In an isolated conductor, free electrons keep on moving but no net magnetic force acts on a conductor in a magnetic field. Statement-2: In a conductor, the average velocity of thermal motion of electrons is zero. Hence no current flows through the conductor.
Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanation of Statement-1.
Both Statement-1 and Statement-2 are true but Statement-2 is not correct explanation of Statement-1.
Statement-1 is true but Statement-2 is false.
Statement-1 and Statement-2 are false.

Solution Explained:

To solve this problem, we apply the core principles of Force Acting on Moving Charges. Understanding the underlying formula is key to arriving at the correct answer below:

The net magnetic force on a current-carrying conductor is given by \(F = I L B\). Since average velocity of thermal motion is zero, current \(I = 0\), resulting in zero net force.

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